AR094682A1 - LOW FREQUENCY EMPHASIS FOR LPC-BASED CODING (LINEAR PREDICTION CODING) IN THE FREQUENCY DOMAIN - Google Patents
LOW FREQUENCY EMPHASIS FOR LPC-BASED CODING (LINEAR PREDICTION CODING) IN THE FREQUENCY DOMAINInfo
- Publication number
- AR094682A1 AR094682A1 ARP140100298A ARP140100298A AR094682A1 AR 094682 A1 AR094682 A1 AR 094682A1 AR P140100298 A ARP140100298 A AR P140100298A AR P140100298 A ARP140100298 A AR P140100298A AR 094682 A1 AR094682 A1 AR 094682A1
- Authority
- AR
- Argentina
- Prior art keywords
- linear prediction
- prediction coding
- spectrum
- low frequency
- coding
- Prior art date
Links
- 238000001228 spectrum Methods 0.000 abstract 8
- 230000005236 sound signal Effects 0.000 abstract 3
- 238000000034 method Methods 0.000 abstract 2
- 230000003595 spectral effect Effects 0.000 abstract 2
- 238000004364 calculation method Methods 0.000 abstract 1
- 238000004590 computer program Methods 0.000 abstract 1
- 230000001755 vocal effect Effects 0.000 abstract 1
Classifications
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
- G10L19/087—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters using mixed excitation models, e.g. MELP, MBE, split band LPC or HVXC
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/06—Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/16—Vocoder architecture
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/26—Pre-filtering or post-filtering
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/26—Pre-filtering or post-filtering
- G10L19/265—Pre-filtering, e.g. high frequency emphasis prior to encoding
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/02—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
- G10L19/0212—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders using orthogonal transformation
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
- G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
-
- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
- G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
- G10L2019/0001—Codebooks
- G10L2019/0016—Codebook for LPC parameters
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computational Linguistics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
La presente proporciona un codificador de audio y método para codificar una señal de audio no vocal con el fin de producir una corriente de bits a partir de la misma, en el que el codificador de audio comprende: una combinación (2, 3) de un filtro de codificación de predicción lineal (2) que tiene una pluralidad de coeficientes de codificación de predicción lineal (LC) y un convertidor de tiempo-frecuencia (3), en el que la combinación (2, 3) está configurada para filtrar y convertir un cuadro (FI) de la señal de audio (AS) en un dominio de frecuencia con el fin de emitir un espectro (SP) basado en el cuadro (FI) y en los coeficientes de codificación de predicción lineal (LC); un enfatizador de bajas frecuencias (4) configurado para calcular un espectro procesado (PS) basado en el espectro (SP), en el que se enfatizan las líneas espectrales (SL) del espectro procesado (PS) que representan una frecuencia más baja que una línea espectral de referencia (RSL); y un dispositivo de control (5) configurado para controlar el cálculo del espectro procesado (PS) por el enfatizador de bajas frecuencias (4) en función de los coeficientes de codificación de predicción lineal (LC) del filtro de codificación de predicción lineal (2). Asimismo, la presente proporciona un decodificador de audio correspondiente, un sistema, un método para decodificar una corriente de bits que contiene espectros cuantificados y una pluralidad de coeficientes de codificación de predicción lineal y un programa informático correspondiente.This provides an audio encoder and method for encoding a non-vocal audio signal in order to produce a stream of bits therefrom, in which the audio encoder comprises: a combination (2, 3) of a linear prediction coding filter (2) having a plurality of linear prediction coding coefficients (LC) and a time-frequency converter (3), in which the combination (2, 3) is configured to filter and convert a frame (FI) of the audio signal (AS) in a frequency domain in order to emit a spectrum (SP) based on the frame (FI) and the linear prediction coding coefficients (LC); a low frequency emphasizer (4) configured to calculate a processed spectrum (PS) based on the spectrum (SP), which emphasizes the spectral lines (SL) of the processed spectrum (PS) that represent a lower frequency than a reference spectral line (RSL); and a control device (5) configured to control the calculation of the processed spectrum (PS) by the low frequency emphasizer (4) based on the linear prediction coding coefficients (LC) of the linear prediction coding filter (2) ). Likewise, the present provides a corresponding audio decoder, a system, a method for decoding a bit stream containing quantified spectra and a plurality of linear prediction coding coefficients and a corresponding computer program.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201361758103P | 2013-01-29 | 2013-01-29 |
Publications (1)
Publication Number | Publication Date |
---|---|
AR094682A1 true AR094682A1 (en) | 2015-08-19 |
Family
ID=50030281
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ARP140100298A AR094682A1 (en) | 2013-01-29 | 2014-01-29 | LOW FREQUENCY EMPHASIS FOR LPC-BASED CODING (LINEAR PREDICTION CODING) IN THE FREQUENCY DOMAIN |
ARP190102203A AR115901A2 (en) | 2013-01-29 | 2019-08-02 | LOW FREQUENCY EMPHASIS FOR LPC-BASED CODING (LINEAR PREDICTION CODING) IN THE FREQUENCY DOMAIN |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ARP190102203A AR115901A2 (en) | 2013-01-29 | 2019-08-02 | LOW FREQUENCY EMPHASIS FOR LPC-BASED CODING (LINEAR PREDICTION CODING) IN THE FREQUENCY DOMAIN |
Country Status (20)
Country | Link |
---|---|
US (5) | US10176817B2 (en) |
EP (1) | EP2951814B1 (en) |
JP (1) | JP6148811B2 (en) |
KR (1) | KR101792712B1 (en) |
CN (2) | CN105122357B (en) |
AR (2) | AR094682A1 (en) |
AU (1) | AU2014211520B2 (en) |
BR (1) | BR112015018040B1 (en) |
CA (1) | CA2898677C (en) |
ES (1) | ES2635142T3 (en) |
HK (1) | HK1218018A1 (en) |
MX (1) | MX346927B (en) |
MY (1) | MY178306A (en) |
PL (1) | PL2951814T3 (en) |
PT (1) | PT2951814T (en) |
RU (1) | RU2612589C2 (en) |
SG (1) | SG11201505911SA (en) |
TW (1) | TWI536369B (en) |
WO (1) | WO2014118152A1 (en) |
ZA (1) | ZA201506314B (en) |
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JP6148811B2 (en) * | 2013-01-29 | 2017-06-14 | フラウンホーファーゲゼルシャフト ツール フォルデルング デル アンゲヴァンテン フォルシユング エー.フアー. | Low frequency emphasis for LPC coding in frequency domain |
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KR102569784B1 (en) * | 2016-09-09 | 2023-08-22 | 디티에스, 인코포레이티드 | System and method for long-term prediction of audio codec |
EP3382701A1 (en) | 2017-03-31 | 2018-10-03 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Apparatus and method for post-processing an audio signal using prediction based shaping |
CN111386568B (en) * | 2017-10-27 | 2023-10-13 | 弗劳恩霍夫应用研究促进协会 | Apparatus, method, or computer readable storage medium for generating bandwidth enhanced audio signals using a neural network processor |
US10957331B2 (en) | 2018-12-17 | 2021-03-23 | Microsoft Technology Licensing, Llc | Phase reconstruction in a speech decoder |
US10847172B2 (en) * | 2018-12-17 | 2020-11-24 | Microsoft Technology Licensing, Llc | Phase quantization in a speech encoder |
CN113348507A (en) * | 2019-01-13 | 2021-09-03 | 华为技术有限公司 | High resolution audio coding and decoding |
TWI789577B (en) * | 2020-04-01 | 2023-01-11 | 同響科技股份有限公司 | Method and system for recovering audio information |
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2014
- 2014-01-28 JP JP2015554192A patent/JP6148811B2/en active Active
- 2014-01-28 KR KR1020157022714A patent/KR101792712B1/en active IP Right Grant
- 2014-01-28 MX MX2015009752A patent/MX346927B/en active IP Right Grant
- 2014-01-28 RU RU2015136223A patent/RU2612589C2/en active
- 2014-01-28 PL PL14701984T patent/PL2951814T3/en unknown
- 2014-01-28 BR BR112015018040-0A patent/BR112015018040B1/en active IP Right Grant
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